How can the power of an object required to lift a mass up a height be increased ? A .reduce the height
B .reduce the mass
C .increase the time
D .reduce the time

What is created when solids,liquids,an gases mix with one another

Which type of heating system is used to heat many buildings from a central location?

An olympic runner leaps over a hurdle. the acceleration of gravity is 9.81 m/s2 . if the runner’s initial vertical speed is 2.0 m/s, how much will the runner’s center of mass be raised during the jump?